Crash on part generation in the presence of tremolos

I don't see the pattern in the scores affected - I can generate parts for the Nutcracker Overture, which has no notes for Contrabass and Violoncello and is large. I can for a small wind section for Megalovania. I can't for either movement of Dvorak, which is an issue as the Dvorak parts were the entire point of that score.

Dvorak crashes if I so much as try to generate a single Flute I part. Maybe voices have something to do here? I put in cues in other voices on both Dvorak Scores, but not for either the Nutcracker Overture or Megalovania.

Edit: definitely voices, I could generate a part from the one staff that didn't have cues.

Alright, maybe it isn't voices, or the cue notes? I managed to generate parts on Contrabasso and Violoncello in Mvt1, so I tried some more things to isolate, short of actually building MS3, which is a thing I should do.

I found that when I tried to fake generate a part by making staves invisible, that also crashed the program. I did manage to find out that I could have both Violin II and Viola as the only two visible staves without crashing, though simply moving around the score crashed once, and I got this fun artifact

So maybe it's another layout thing? There are no mmrests, and Vl. II and Viola both crash if they are the only staves visible, but don't if they have even one other staff onscreen. To save clicks, attaching score with everything invisible except those two staves.

Zooming in all the way on the artifact - the measure numbers 264 and 272 are displayed above that top stave, and yes, the measure overlay matches those numbers. The bottom system collision looks to be measures 268 and 277.